今本《易經》六十四卦卦序排列，首二卦為〈乾〉、〈坤〉，最末二卦為〈既濟〉、〈未濟〉，首尾聯結的方式就表示出一套宇宙化生過程：〈乾〉、〈坤〉起始，象徵萬物化生的基始：〈既濟〉、〈未濟〉為末，象徵萬物化生的無窮性，既濟續之以未濟，代表宇宙之生滅變化永不停止，充分顯示宇宙的始終無限。卦序的排列思維，〈乾〉、〈坤〉以至〈既濟〉、〈未濟〉，不僅是卦的順序，亦象徵宇宙化生歷程，表示宇宙過程永無窮盡。

The first two divinatory symbols of the sixty-four divinatory symbols in today’s “Yi-ching” are the “Chain” and “Kuen”, and the last two are the “Ji-Ji” and “Wei-Ji”. The connection of the beginning and the end indicates a process of the universal constructing. As the beginning, “Chain” and “Kuen” represent the basis and start of everything in the world. As the ending, “Ji-Ji” and “Wei-Ji” represent the infinite of everything in the world. “Ji-Ji” followed by “Wei-Ji”, indicates the changing in the universe is endless. So the arrangement from “Chain” “Kuen” to “Ji-Ji” “Wei-Ji” doesn’t only mean the order of the divinatory symbols, buy also represents the process of the universal constructing and indicates the endless process in the universe.